JL Polartec Stretch Fleece Shirt Constructed of Malden's Powerstretch with zippered mock neck, this shirt provides the ultimate in warmth. Thick and toasty, but absolutely supple, a polartec shirt is astonishingly lightwweight for its performance. The body is available in black, navy, royal blue and orange. Contrast armstripe and pinstriping on the collar is standard, and can come in almost any color imaginable. Add pinstriping on the armstripe for even more zip. Use our Design Studio to create your JL Polartec in your team colors with logos just about anywhere.